E04VLF may be used to supply individual optional parameters to
E04VHF. The initialization routine
E04VGF must have been called before calling E04VLF.
E04VLF may be used to supply values for optional parameters to
E04VHF. It is only necessary to call E04VLF for those parameters whose values are to be different from their default values. One call to E04VLF sets one parameter value.
Each optional parameter is defined by a single character string,
of up to
characters,
consisting of one or more items. The items associated with a given option must be separated by spaces, or equals signs
. Alphabetic characters may be upper or lower case. The string
Print Level = 1
is an example of a string used to set an optional parameter. For each option the string contains one or more of the following items:
| – |
a mandatory keyword; |
| – |
a phrase that qualifies the keyword; |
| – |
a number that specifies an integer or real value. Such numbers may be up to contiguous characters
in Fortran's I, F, E or D formats,
terminated by a space if this is not the last item on the line. |
For E04VLF, each user-specified option is not normally printed as it is defined, but this printing may be turned on using the keyword
List. Thus the statement
CALL E04VLF ('List', CW, IW, RW, IFAIL)
turns on printing of this and subsequent options. Printing may be turned off again using the keyword
Nolist.
Optional parameter settings are preserved following a call to
E04VHF and so the keyword
Defaults is provided to allow you to reset all the optional parameters to their default values before a subsequent call to
E04VHF.
A complete list of optional parameters, their abbreviations, synonyms and default values is given in
Section 12 in E04VHF.
None.
If on entry
or
, explanatory error messages are output on the current error message unit (as defined by
X04AAF).
Not applicable.
Not applicable.
E04VKF,
E04VMF or
E04VNF may also be used to supply optional parameters to
E04VHF.